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Finding the Fourth Proportional to 220,421.70, 330,632.55 and 54,209.70

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Solution

The fourth proportional to 220,421.70, 330,632.55 and 54,209.70 is: 81,314.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,421.70 : 330,632.55 = 54,209.70 : x
  2. Step 2: Convert to fraction form
    220,421.70/330,632.55 = 54,209.70/x
  3. Step 3: Cross multiply
    220,421.70x = 330,632.55 × 54,209.70
  4. Step 4: Simplify right side
    220,421.70x = 17,923,491,345.74
  5. Step 5: Solve for x
    x = 17,923,491,345.74/220,421.70
  6. Step 6: Final answer
    x = 81,314.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.